Lock Screen Timeout Settings on Windows PC (opens in new tab)

Not sure if I have forgotten to set something or if I have not set something right but looking at some Windows 11 devices we have, I can see via Control Panel power settings that the monitor is set to go to sleep after 25 minutes but I wonder if this only applies when left open on desktop because from lock screen, monitors are going blank after a minute or so. It doesn't look like the devices (Intel NUCs) are going to sleep themselves because the power light is still a solid blue, mouse laser...